Fluent整车应用解决方案

Cruise 2023年9月19日浏览：1163

Fluent整车应用解决方案的图1

外气动及热管理

UTM的应用领域

行驶工况

瞬态UTM

瞬态CHT技术路线

-耦合CHT

直接全瞬态耦合(流动+能量+辐射)

通过可变时间步长加速收敛

-解耦CHT

将流动过程和传热过程解耦求解

基于两个求解器的System Coupling

基于单个求解器(脚本控制)

-定速行驶和热浸过程

强制对流过程：流动是准稳态

热浸过程：流动是瞬态

解耦/弱耦合CHT

-需要两个求解器参与，并需要使用调度工具完成耦合(Mpcci,System Coupling,Co-simulation )

-弱耦合，仅在界面上传递数据，需要迭代数次完成

-HTC可能与温度相关：热浸过程

Fluent瞬态UTM整体流程介绍

Ford应用案例

模型概况

运行工况

壁面温度

GM应用案例

计算时间统计

雨刮器挂水

多相流模型过渡：双向VOF ↔ DPM

模型过渡

模型过渡示例：雨刮器仿真

整车涉水

气动噪声

VRXPERIENCE (VRX) Sound集成

VRX Sound Analysis in Ansys Fluent

VRX Sound: 心理声学

-聚焦于声音刺激与个人感官之间的关系.

-可以计算声音的若干心理学指标.

-Note that sounds can be Stationary, Non-stationary, and Impulsivey

· 静态声音

· 瞬态声音

· 冲击声音

VRX Sound: 心理声学指标

Loudness响度 - A sensory scale of sound intensity. It was developed experimentally based on the research work in the field of psychophysics in the late 19th century (E. Weber, G. Fechner) and in the 1950s (S. S. Stevens). Units of loudness are sones and phons.

Sound Levels声强 – Overall acoustics sound pressure levels in decibels (can be A-weighted).

Sharpness锐度 - An attribute that is related to the timbre of a sound, and is a subjective attribute describing the perception of the spectral balance of a given sound. Unit of sharpness is the acum.

Tonality Profile音调 – Identifies emerging tones (number, frequencies, levels, etc.) to determine each tone’s contribution in the perception of a sound.

Articulation Index - a dimensionless sound metric that indicates how much background sound levels interfere with human speech. Its value ranges from 0 (speech cannot be understood) to 1 (all speech can be clearly understood).

基于Ansys Fluent 的仿真